DE10052196B4 - Mikrofoneinheit - Google Patents

Mikrofoneinheit Download PDF

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Publication number
DE10052196B4
DE10052196B4 DE10052196A DE10052196A DE10052196B4 DE 10052196 B4 DE10052196 B4 DE 10052196B4 DE 10052196 A DE10052196 A DE 10052196A DE 10052196 A DE10052196 A DE 10052196A DE 10052196 B4 DE10052196 B4 DE 10052196B4
Authority
DE
Germany
Prior art keywords
electrode
microphone unit
layer
electret capacitor
transistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE10052196A
Other languages
German (de)
English (en)
Other versions
DE10052196A1 (de
Inventor
Takanobu Takeuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE10052196A1 publication Critical patent/DE10052196A1/de
Application granted granted Critical
Publication of DE10052196B4 publication Critical patent/DE10052196B4/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
DE10052196A 2000-02-15 2000-10-20 Mikrofoneinheit Expired - Fee Related DE10052196B4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPP00-36326 2000-02-15
JP2000036326A JP4057212B2 (ja) 2000-02-15 2000-02-15 マイクロフォン装置

Publications (2)

Publication Number Publication Date
DE10052196A1 DE10052196A1 (de) 2001-08-30
DE10052196B4 true DE10052196B4 (de) 2005-07-14

Family

ID=18560380

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10052196A Expired - Fee Related DE10052196B4 (de) 2000-02-15 2000-10-20 Mikrofoneinheit

Country Status (3)

Country Link
US (1) US7039202B1 (ja)
JP (1) JP4057212B2 (ja)
DE (1) DE10052196B4 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003230195A (ja) 2002-02-06 2003-08-15 Hosiden Corp エレクトレットコンデンサマイクロホン
US7620192B2 (en) 2003-11-20 2009-11-17 Panasonic Corporation Electret covered with an insulated film and an electret condenser having the electret
JP4264103B2 (ja) * 2004-03-03 2009-05-13 パナソニック株式会社 エレクトレットコンデンサーマイクロホン
JP4137158B2 (ja) 2004-03-05 2008-08-20 松下電器産業株式会社 エレクトレットコンデンサーマイクロフォン
DE102004011144B4 (de) * 2004-03-08 2013-07-04 Infineon Technologies Ag Drucksensor und Verfahren zum Betreiben eines Drucksensors
KR20080031467A (ko) * 2005-08-30 2008-04-08 야마하 가부시키가이샤 컨덴서 마이크로폰 및 컨덴서 마이크로폰의 제조 방법
JP4587126B2 (ja) * 2006-01-27 2010-11-24 ヤマハ株式会社 コンデンサマイクロホン及びコンデンサマイクロホンの製造方法
JP4764234B2 (ja) * 2006-04-07 2011-08-31 株式会社東芝 インピーダンス変換回路及び電子機器
TWI339007B (en) * 2006-11-21 2011-03-11 Ind Tech Res Inst Design method of low frequency analog circuit and low frequency analog circuit using the same
JP2008311832A (ja) * 2007-06-13 2008-12-25 Yamaha Corp 電気音響変換器
JP6461603B2 (ja) 2012-11-02 2019-01-30 ローム株式会社 チップコンデンサ、回路アセンブリ、および電子機器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116366A (en) * 1959-08-18 1963-12-31 Arnold L Seligson Capacitive source signal generators
US4361735A (en) * 1977-08-24 1982-11-30 The Post Office Electret microphone circuit
DE3413145A1 (de) * 1984-04-07 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektretmikrofon mit vorverstaerker
DE68913177T2 (de) * 1988-12-30 1994-07-07 United Technologies Corp Kapazitiver Drucksensor und Verfahren zum Minimieren der parasitären Kapazität eines kapazitiven Drucksensors.
WO1994023547A1 (en) * 1993-04-07 1994-10-13 A/S Brüel & Kjær A method and a coupling for reducing the harmonic distortion of a capacitive transducer
DE19600689C2 (de) * 1995-01-11 1998-02-12 Yoshiro Tomikawa Schaltung zum Verringern einer kapazitiven Komponente in einer elektrostatischen Wandlereinrichtung
US5767545A (en) * 1996-01-09 1998-06-16 Nec Corporation Power mosfet having current detection means
DE19839978A1 (de) * 1997-09-03 1999-03-18 Hosiden Corp Tonmeßgeber und dessen Herstellverfahren sowie Halbleiter-Elektret-Kondensatorenmikrophon mit dem drin eingebauten Tonmeßgeber
DE19753279A1 (de) * 1997-12-01 1999-06-02 Sgs Thomson Microelectronics Elektrische Schaltung mit mindestens einem geschalteten Kondensator und Verfahren zum Betreiben dieser Schaltung
DE69511207T2 (de) * 1994-05-05 2000-02-03 Knowles Electronics Inc Festkörperkondensator und mikrofonvorrichtungen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7115947A (ja) * 1971-11-19 1973-05-22
CH589973A5 (ja) * 1975-11-06 1977-07-29 Bolex Int Sa
US4255716A (en) * 1977-09-10 1981-03-10 Tokyo Shibaura Denki Kabushiki Kaisha Automatic gain control circuit
US4491972A (en) * 1981-05-26 1985-01-01 Motorola, Inc. Radio transmitter modulation control circuitry
US4518829A (en) * 1984-04-02 1985-05-21 Gte Communications Systems Corporation Two terminal microphone active load gain regulation circuit
US4731849A (en) * 1986-07-30 1988-03-15 Bloomfield Iii John W Electronic ausculscope
NL1002783C2 (nl) * 1996-04-03 1997-10-06 Microtronic Nederland Bv Geïntegreerde microfoon/versterker-eenheid, en versterkermodule daarvoor.
JP4227679B2 (ja) * 1998-05-07 2009-02-18 株式会社オーディオテクニカ インピーダンス変換器
US6580797B1 (en) * 1998-07-15 2003-06-17 Vxi Corporation Amplifier circuit for electret microphone with enhanced performance
US6681020B1 (en) * 1999-04-09 2004-01-20 Vxi Corporation Microphone circuit with mute and keep alive function
DE60011349T2 (de) * 1999-07-08 2005-06-16 Matsushita Electric Industrial Co., Ltd., Kadoma Kondensator-mikrofongerät und Verbindungsvorrichtung
JP4129108B2 (ja) * 2000-02-25 2008-08-06 三菱電機株式会社 マイクロフォン用フィルタおよびマイクロフォン装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116366A (en) * 1959-08-18 1963-12-31 Arnold L Seligson Capacitive source signal generators
US4361735A (en) * 1977-08-24 1982-11-30 The Post Office Electret microphone circuit
DE3413145A1 (de) * 1984-04-07 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektretmikrofon mit vorverstaerker
DE68913177T2 (de) * 1988-12-30 1994-07-07 United Technologies Corp Kapazitiver Drucksensor und Verfahren zum Minimieren der parasitären Kapazität eines kapazitiven Drucksensors.
WO1994023547A1 (en) * 1993-04-07 1994-10-13 A/S Brüel & Kjær A method and a coupling for reducing the harmonic distortion of a capacitive transducer
DE69511207T2 (de) * 1994-05-05 2000-02-03 Knowles Electronics Inc Festkörperkondensator und mikrofonvorrichtungen
DE19600689C2 (de) * 1995-01-11 1998-02-12 Yoshiro Tomikawa Schaltung zum Verringern einer kapazitiven Komponente in einer elektrostatischen Wandlereinrichtung
US5767545A (en) * 1996-01-09 1998-06-16 Nec Corporation Power mosfet having current detection means
DE19839978A1 (de) * 1997-09-03 1999-03-18 Hosiden Corp Tonmeßgeber und dessen Herstellverfahren sowie Halbleiter-Elektret-Kondensatorenmikrophon mit dem drin eingebauten Tonmeßgeber
DE19753279A1 (de) * 1997-12-01 1999-06-02 Sgs Thomson Microelectronics Elektrische Schaltung mit mindestens einem geschalteten Kondensator und Verfahren zum Betreiben dieser Schaltung

Also Published As

Publication number Publication date
JP2001231098A (ja) 2001-08-24
US7039202B1 (en) 2006-05-02
DE10052196A1 (de) 2001-08-30
JP4057212B2 (ja) 2008-03-05

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee